多次波压制技术在南海北部陆缘深水区的应用  

Application of multiple elimination techniques in the deepwater continental margin of northern South China Sea

作　　者：贾连凯 吴时国[1] 赵昌垒[3] 

机构地区：[1]中国科学院海洋研究所中国科学院海洋地质与环境重点实验室,青岛266071 [2]中国科学院大学,北京100049 [3]中国石油勘探开发研究院,北京100083

出　　处：《地球物理学进展》2014年第2期920-930,共11页Progress in Geophysics

基　　金：国家自然科学基金重点项目《南海深水盆地流体渗漏系统及天然气水合物成藏机理》(40930845)资助

摘　　要：南海北部洋陆过渡带水深变化剧烈,海底地形崎岖,构造复杂多变,地震勘探中多次波十分发育,常规处理难以取得很好的成像效果.由于方法的局限性,任何一种多次波压制方法都很难彻底地压制全部多次波.本文通过对国家基金委共享航次在南海北部陆缘采集的二维反射地震资料的分析,总结了不同多次波压制技术的优缺点和适用范围,结合滤波类方法和波动理论类方法,综合应用了表面相关多次波衰减法(SRME,Surface Related Multiple Elimination)、τ-p域预测反褶积、高分辨率抛物线Radon变换以及叠后压制残余多次波等方法去除多次波,有效突出了一次反射波,证明了方法的有效性和实用性,同时也形成了针对南海深水资料多次波压制的一种有效的处理流程和方法组合.Due to the variable waterdepth, rugged geomorphology and complex structure occurred in the ocean-continental crust transition zone in the northern South China Sea, various multiples occur in the seismic exploration. Positive effects can not be achieved by conventional processing. As a result of limitations of methods, any single method of multiple suppression is hard to suppress all multiples preferably. According to the quality analysis of a block of 2D seismic data of South China Sea, we summarized the merits and demerits and application range of different multiple elimination techniques. We believe it is a good way to combine the filtering methods with the wave theory methods. Integrating the Surface Related Multiple Elimination （SRME）, predictive deconvolution in τ-p domain, high-resolution Radon transform and post-stack suppressing remaining noise methods, we highlighted the effective reflections and proved its practicability. Meanwhile, we also formed an effective processing flow chart and combination methods aiming at the deepwater seismic data in the South China Sea.

关 键 词：南海北部 多次波 SRME 预测反褶积 RADON变换 

分 类 号：P631[天文地球—地质矿产勘探] P738[天文地球—地质学]